Answers: They be just your standard big bore grease injected two-stroke on-off road bike. The motocross version be a TM 400. It is surprizing that you have found one still surrounded by good shape after adjectives these years. You should consider joining the Vintage Japanese Motorcycle Club (www.vjmc.com), it maybe be a accurate source of parts and info for you.
I have a friend that have a new BMW, one banger, can't remember what the size is? I suppose its a 2005 or 2006? He does alot of on/off road riding. He really like it! Possibly a 350?
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